Earthquakes Flashcards
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a type of fault where the hanging wall slides upward; caused by compression in the crust
Reverse Fault
A numerical rating system that measures the energy of an earthquake (Uses the seismograph)
Richter Scale
A 7.0 Earthquake is how much stronger than a 5.0 Earthquake?
100x stronger
Look at the map. What could you infer about areas with greater risk of earthquake damage?
These areas are at high risk because they are located on or near plate boundaries or fault lines.
A fault where the 2 sides slide or shear past each other.
strike-slip fault
Where is the epicenter?
Directly above the focus.
Which type of fault is shown below, where compressional forces push one side of the fault up?
Reverse fault
In a Normal Fault - what type of forces pull each side of the fault apart from each other so one side slides down?
Tensional forces
the point under Earth’s surface where an earthquake starts
Focus
break in rock caused by tension forces, where rock above the fault surface moves down relative to the rock below the surface
Normal fault
The point within the earth where the earthquake originates
Focus
Compression
Squeezes rock together causing folds and fractures
The study of seismic waves and earthquakes that move through & around Earth
Seismology
a logarithmic scale of one-ten used to express the energy released by an earthquake
Richter Scale
waves of energy caused by breaking of rock
seismic waves
